Maintenance Manual SUNNY CENTRAL 500CP-US/CA / 500CP-US/CA 600V / 630CP-US/CA / 720CP-US/CA / 750CP-US/CA / 800CP-US/CA / 850CP-US/CA / 900CP-US/CA

Transcription

1 Maintenance Manual SUNNY CENTRAL 500CP-US/CA / 500CP-US/CA 600V / 630CP-US/CA / 720CP-US/CA / 750CP-US/CA / 800CP-US/CA / 850CP-US/CA / 900CP-US/CA SCCP-US-WH-US_en Version 3.0 AMERICAN ENGLISH

2 Legal Provisions SMA America, LLC Legal Provisions Copyright 2014 SMA America, LLC. All rights reserved. No part of this document may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, be it electronic, mechanical, photographic, magnetic or otherwise, without the prior written permission of SMA America, LLC. Neither SMA America, LLC nor SMA Solar Technology Canada Inc. makes representations, express or implied, with respect to this documentation or any of the equipment and/or software it may describe, including (with no limitation) any implied warranties of utility, merchantability, or fitness for any particular purpose. All such warranties are expressly disclaimed. Neither SMA America, LLC nor its distributors or dealers nor SMA Solar Technology Canada Inc. nor its distributors or dealers shall be liable for any indirect, incidental, or consequential damages under any circumstances. (The exclusion of implied warranties may not apply in all cases under some statutes, and thus the above exclusion may not apply.) Specifications are subject to change without notice. Every attempt has been made to make this document complete, accurate and up-to-date. Readers are cautioned, however, that SMA America, LLC and SMA Solar Technology Canada Inc. reserve the right to make changes without notice and shall not be responsible for any damages, including indirect, incidental or consequential damages, caused by reliance on the material presented, including, but not limited to, omissions, typographical errors, arithmetical errors or listing errors in the content material. Trademarks All trademarks are recognized, even if not explicitly identified as such. A lack of identification does not mean that a product or symbol is not trademarked. The Bluetooth word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. and any use of these marks by SMA America, LLC and SMA Solar Technology Canada Inc. is under license. Modbus is a registered trademark of Schneider Electric and is licensed by the Modbus Organization, Inc. QR Code is a registered trademark of DENSO WAVE INCORPORATED. Phillips and Pozidriv are registered trademarks of Phillips Screw Company. Torx is a registered trademark of Acument Global Technologies, Inc. SMA America, LLC 3801 N. Havana Street Denver, CO U.S.A. SMA Solar Technology Canada Inc Matheson Blvd. E 7th Floor Mississauga, ON L4W 5K4 Canada 2 SCCP-US-WH-US_en-30 Maintenance Manual

3 SMA America, LLC Important Safety Instructions Important Safety Instructions SAVE THESE INSTRUCTIONS This manual contains important instructions for the following products: Sunny Central 500CP-US/CA (SC 500CP-US-10) Sunny Central 500CP-US/CA 600V (SC 500CP-US V) Sunny Central 630CP-US/CA (SC 630CP-US-10) Sunny Central 720CP-US/CA (SC 720CP-US-10) Sunny Central 750CP-US/CA (SC 750CP-US-10) Sunny Central 800CP-US/CA (SC 800CP-US-10) Sunny Central 850CP-US/CA (SC 850CP-US-10) Sunny Central 900CP-US/CA (SC 900CP-US-10) This manual must be followed during installation and maintenance. The product is designed and tested in accordance with international safety requirements, but as with all electrical and electronic equipment, certain precautions must be observed when installing and/or operating the product. To reduce the risk of personal injury and to ensure the safe installation and operation of the product, you must carefully read and follow all instructions, cautions and warnings in this manual. Warnings in this document A warning describes a hazard to equipment or personnel. It calls attention to a procedure or practice, which, if not correctly performed or adhered to, could result in damage to or destruction of part or all of the SMA equipment and/or other equipment connected to the SMA equipment or personal injury. Maintenance Manual Symbol Description DANGER indicates a hazardous situation which, if not avoided, will result in death or serious injury. WARNING indicates a hazardous situation which, if not avoided, could result in death or serious injury. CAUTION indicates a hazardous situation which, if not avoided, could result in minor or moderate injury. NOTICE is used to address practices not related to personal injury. Maintenance Manual SCCP-US-WH-US_en-30 3

4 Warnings on this product SMA America, LLC Warnings on this product The following symbols are used as product markings with the following meanings. Symbol Description Warning regarding dangerous voltage The product works with high voltages. All work on the product must only be performed as described in the documentation of the product. Beware of hot surface The product can become hot during operation. Do not touch the product during operation. Electric arc hazards The product has large electrical potential differences between its conductors. Arc flashes can occur through air when high-voltage current flows. Do not work on the product during operation. Risk of fire Improper installation of the product may cause a fire. Observe the operating instructions Read the documentation of the product before working on it. Follow all safety precautions and instructions as described in the documentation. General Warnings All electrical installations must be made in accordance with the local and National Electrical Code ANSI/NFPA 70 or the Canadian Electrical Code CSA C22.1. This document does not and is not intended to replace any local, state, provincial, federal or national laws, regulations or codes applicable to the installation and use of the product, including without limitation applicable electrical safety codes. All installations must conform with the laws, regulations, codes and standards applicable in the jurisdiction of installation. SMA assumes no responsibility for the compliance or noncompliance with such laws or codes in connection with the installation of the product. Before installing or using the product, read all of the instructions, cautions, and warnings in this manual. Before connecting the product to the electrical utility grid, contact the local utility company. This connection must be made only by qualified personnel. Wiring of the product must be made by qualified personnel only. 4 SCCP-US-WH-US_en-30 Maintenance Manual

5 SMA America, LLC Table of Contents Table of Contents 1 Information on this Document Validity Target Group Additional Information Symbols Typographies Nomenclature Abbreviations Safety Intended Use Safety Precautions Personal Protective Equipment Symbols on the inverter Product Description Plant Overview Design of the Inverter Type Label Symbols on the Product Schematic Diagram Information on Maintenance Maintenance Intervals Spare Parts Maintenance with DC, AC and Control Voltage Present Reading the Replacement Interval Meter Reading Error Messages and Warnings Checking the DC Contactor in Units without the Integrated DC Switch Checking the AC Circuit Breaker Disconnecting the Inverter Maintenance in Disconnected State Safety Removing the Panels Cleaning the Ventilation Plate Cleaning the Air Duct and Insect Screens Cleaning the Interior Checking the Fuses Checking the Surge Arrester Checking the Screw Connection of the Power Cabling Checking the Safety Labels Inverter without Integrated DC Switch Inverter with Integrated DC Switch Checking the Door Seals Maintenance Manual SCCP-US-WH-US_en-30 5

6 SMA America, LLC Table of Contents 7.11 Checking the Latches, Door Stops and Hinges Checking the Switch Cabinet for Corrosion Mounting the Panels Connecting the Control Voltage Maintenance when Control Voltage is Present Safety Checking the Integrated DC Switch Checking the Heating Element, Hygrostat and Fan Contact Revision History Maintenance Manual SCCP-US-WH-US_en-30 6

7 SMA America, LLC 1 Information on this Document 1 Information on this Document This section provides important information on how to use this document and how to work with the inverter. Among other things, this document specifies the inverters for which this document is valid and the target group for which it has been written. 1.1 Validity This document is valid for the following inverters: Sunny Central 500CP-US/CA (SC 500CP-US-10) Sunny Central 500CP-US/CA 600V (SC 500CP-US V) Sunny Central 630CP-US/CA (SC 630CP-US-10) Sunny Central 720CP-US/CA (SC 720CP-US-10) Sunny Central 750CP-US/CA (SC 750CP-US-10) Sunny Central 800CP-US/CA (SC 800CP-US-10) Sunny Central 850CP-US/CA (SC 850CP-US-10) Sunny Central 900CP-US/CA (SC 900CP-US-10) This document describes the maintenance of the inverter. 1.2 Target Group This document is intended for qualified persons. Only qualified personnel are allowed to perform the tasks described in this document. Qualified persons have received appropriate training and have demonstrated the ability and knowledge to install, operate, and perform maintenance on the device. Qualified persons have been trained in how to deal with the dangers and risks associated with installing electrical installations and possess all the necessary knowledge for averting danger. Qualified persons are aware of the obligation to wear Hazard Risk Category 2 personal protective equipment and always comply with the general safety regulations for dealing with electric voltage. Qualified persons have been trained in how to deal with the dangers and risks associated with installing electrical installations as specified in 29 CFR, Chapter XVII, Part 1910 (OSHA), NEC, and NFPA 70E, and possess all the necessary background for averting danger. There must be written documentation of their training. 1.3 Additional Information You will find further information in the download area of Information Installation Requirements for Sunny Central 500CP-US / 500CP-US 600V / 630CP-US 720CP-US / 750CP-US / 800CP-US / 850CP-US / 900CP-US Medium-voltage transformers - Important Requirements for Medium-Voltage Transformers and Transformers for Auxiliary Power Supply for SUNNY CENTRAL CP-US Series Inverters Sunny Central Communication Controller Document type Technical Information Technical Information Technical Information 1.4 Symbols Symbol Explanation Information that is important for a specific topic or goal, but is not safety-relevant Maintenance Manual SCCP-US-WH-US_en-30 7

8 1 Information on this Document SMA America, LLC Symbol Explanation Indicates a requirement for meeting a specific goal Desired result A problem that could occur 1.5 Typographies Typography Usage Example bold Display messages Elements on a user interface Parameters Terminals Slots Elements to be selected Elements to be entered Select the parameter ExlTrfErrEna and set to Off. Select the tab Parameters. 1.6 Nomenclature The following nomenclature is used in this document: Complete designation SMA America Production, LLC SMA Solar Technology Canada Inc. Sunny Central of the CP-US production series Sunny Central Communication Controller Designation in this document SMA SMA Sunny Central or inverter SC-COM 8 SCCP-US-WH-US_en-30 Maintenance Manual

9 SMA America, LLC 1 Information on this Document 1.7 Abbreviations In this document, abbreviations are used at certain points. In the following table, you will find the full designation and an explanation, where applicable. Abbreviations Designation Explanation AC Alternating Current - DC Direct Current - GFDI Ground Fault Detection Interruption - IP Internet Protocol - OF Optical Fiber - MPP Maximum Power Point - MSL Mean Sea Level - PC Personal Computer - PE Protective Earth Protective conductor PV Photovoltaics - Maintenance Manual SCCP-US-WH-US_en-30 9

10 2 Safety SMA America, LLC 2 Safety In this section, you will find general safety precautions which you must observe whenever working on the Sunny Central inverter. Pay special attention to these sections to avoid personal injury and property damage. 2.1 Intended Use The Sunny Central CP-US is a PV inverter which converts the direct current generated in the PV modules into grid-compliant alternating current. An external MV transformer fitted downstream feeds the alternating current generated into the utility grid. The inverter is designed for indoor and outdoor installation. The inverter is only licensed for use with a suitable transformer and providing that the maximum permissible DC input voltage and the permitted ambient conditions are complied with. The transformer must be designed for voltages that arise during pulsed mode of the inverter. The inverter has been evaluated by UL for compliance with UL 1741 / IEEE 1547 requirements at the inverter s terminals on the local area side of an interconnection transformer for all IEEE 1547 tests other than for Unintentional Islanding. It has additionally been evaluated for selected tests for use with UL Recognized Component low-voltage transformers as noted in the table below: Test Manufacturer Model Electrical Ratings Unintentional Islanding Test J. Schneider DLGX 1000F-1016TO1001 Synchronization, Harmonics, and Open Phase The inverter has not been evaluated for exporting current into low-voltage electrical power system (EPS) with local loads present, and must connect to the medium voltage EPS via an externally-provided medium-voltage transformer. The external medium-voltage transformer shall provide isolated primary and secondary windings rated for the output voltage and kva rating of the inverter. The medium-voltage transformer shall be located between the output of the inverter and the medium-voltage utility power connection. The Authority Having Jurisdiction (AHJ) must consider the effect of the medium-voltage transformer provided in the field with respect to electrical ratings, impedance, and the resultant effects on the utility interconnection performance of the inverter, with respect to the ratings and impedance of the transformer selected. The inverter has not been evaluated for an installation of multiple inverters connected to one transformer. The Authority Having Jurisdiction shall determine if any additional evaluation is necessary of such a system. The inverter can optionally be equipped with an AC power switch for "branch circuit protection". This AC circuit breaker simultaneously acts as the AC Disconnect in accordance with NEC ANSI/NFPA 70 and CEC. For inverters without an AC circuit breaker, "branch circuit protection" and an AC Disconnect must be implemented by the installer. Further information is provided in section 3.1. The inverter with an integrated AC Disconnect can be optionally ordered with an Integrated DC Switch in order to be able to disconnect the inverter from the PV array. If the inverter does not have an Integrated DC Switch, an external DC Disconnect must be installed in accordance with NEC ANSI/NFPA 70 and CEC, in order to be able to disconnect the inverter from the PV array. J. Schneider DLGX 1250F-1001TO1001 Primary 289 V Secondary 480 V, 1,000 kva Primary 480 V / 1,500 A Secondary 480 V / 1,500 A, 1,250 kva If the unit is not provided with a GFDI or insulation monitoring device, this inverter must be used with an external GFDI as required by the Article 690 of the National Electrical Code for the installation location or an external insulation monitoring device according to UL The models SC 850CP-US-10 and SC 900CP-US-10 are only provided with transfer trip functionality to meet unintentional islanding requirements. An external signal is required from the utility (EPS) to cause the inverter to cease-to-energize the EPS during an island condition. Both inverters have also been tested for automatic unintentional islanding performance (IEEE chapter 5.7, "Unintentional Islanding") up to 880 kva AC power. 10 SCCP-US-WH-US_en-30 Maintenance Manual

11 SMA America, LLC 2 Safety The outdoor version of the inverter corresponds to UL 1741 "Type 3R" and can also be operated in rain, sleet, and snow. The indoor version corresponds to UL 1741 "Type 1" and is only licensed for installation in electrical equipment rooms. Only persons fulfilling all of the skills for the target group may work on or with theinverter. Intended use also includes reading the product documentation and observing all safety precautions. All work on the inverter must be performed using appropriate tools and in compliance with the ESD protection regulations. Suitable Hazard Risk Category 2 personal protective equipment is to be worn by all persons working on or with the inverter. Unauthorized persons may not operate the inverter and must keep at a distance from the inverter. No reconstruction, modification or installation of additional components may be carried out on the inverter without the express consent of SMA America, LLC. The inverter must not be operated with its doors open. The inverter must not be opened when it is raining or when humidity exceeds 95%. The inverter must not be operated with any technical defects. For safety reasons, it is forbidden to modify the product or install components that are not explicitly recommended or distributed by SMA. Only use the inverter in accordance with the information provided in the enclosed documentation. Any other application may cause personal injury or property damage. The enclosed documentation is an integral part of this product. Read and observe the documentation. Keep the documentation in a convenient place for future reference. Maintenance Manual SCCP-US-WH-US_en-30 11

12 2 Safety SMA America, LLC 2.2 Safety Precautions This section contains safety precautions that must be observed at all times when working on or with the product. To prevent personal injury or property damage and to ensure long-term operation of the product, read this section carefully and follow all safety precautions at all times. Danger to life from electric shock due to live voltage High voltages are present in the live components of the inverter. Touching live components results in death or serious injury due to electric shock. When working in a high contact-risk environment, wear Hazard Risk Category 2 personal protective equipment. Do not touch live components. Follow the instructions precisely. Observe all safety messages on the product and in the documentation. Observe all safety precautions of the module manufacturer. Before any work on the inverter is performed, always disconnect the following components from voltage sources if live voltage is not absolutely necessary: Line voltage for grid feed-in Internal power supply DC voltage from the PV array Additional external voltages, e.g. control signals of a control room Ensure that no disconnected components can be reconnected. After disconnecting the inverter from voltage sources, wait at least 15 minutes for the capacitors of the Sunny Central to discharge completely. Always check that no voltage is present in any of the components before working on the inverter. Ground and short-circuit the device. Cover or shield any adjacent live components. Danger to life from electric shock due to live DC cables DC cables connected to PV modules that are exposed to sunlight are live. Touching live components results in death or serious injury. Wear suitable Hazard Risk Category 2 personal protective equipment for all work on the inverter. Prior to connecting the DC cables, ensure that the DC cables are voltage-free. Danger to life from electric shock due to ground fault If a ground fault has occurred, parts of the plant that are supposedly grounded may in fact be live. Touching incorrectly grounded components can result in death or very serious injuries from electric shock. Ensure that no voltage is present before touching any components of the PV plant. Wear Hazard Risk Category 2 personal protective equipment for all work on the inverter. Danger to life from electric shock when entering the PV field Ground-fault monitoring with GFDI and Advanced Remote GFDI does not provide protection from injury when GFDI is activated. PV modules grounded by GFDI discharge voltage to ground. Entering the PV field can lead to lethal electric shocks. Before entering the PV field, switch the PV array to insulated operation. Ensure that the insulation resistance of the PV array is greater than 1 k Ω. 12 SCCP-US-WH-US_en-30 Maintenance Manual

13 SMA America, LLC 2 Safety Danger to life from electric shock if the inverter is damaged Operating a damaged inverter can lead to hazardous situations that result in death or serious injuries due to electric shock. Only use the inverter when it is technically faultless and in an operationally safe state. Regularly check the inverter for visible damage. Make sure that all external safety equipment is freely accessible at all times. Make sure that all safety equipment is in good working order. Wear Hazard Risk Category 2 personal protective equipment for all work on the inverter. Danger to life from electric shock even if the inverter is disconnected on the AC and DC sides The precharge unit of the option "Q at Night" is also live if the AC contactor and the DC switch are open. Touching live components of this assembly will result in death or serious injury. Do not touch live components. Do not remove protective covers. Observe the warning messages. Wear personal protective equipment Danger to life from electric shock when the inverter is not locked If the inverter is not locked, this means that unauthorized persons have access to components carrying lethal voltages. Touching live components can result in death or serious injury due to electric shock. Always close and lock the inverter. Remove the keys from the door locks and from the key switch. Keep the keys in a safe place. Ensure that unauthorized persons do not have access to the PV plant. Danger to life due to blocked escape routes In hazardous situations, blocked escape routes can lead to death or serious injury. Opening the doors of two inverters located opposite each other blocks the escape route. It is imperative that the escape route is freely accessible at all times. An escape route of at least 3 ft. (915 mm) width must be available at all times. Make sure the minimum passage width of the route meets local standards. Do not place any objects in the escape route area. Remove all tripping hazards from the escape routes. If two inverters have been installed facing each other, never open the doors of both inverters simultaneously. Risk of fire due to failure to observe torque specifications on high-voltage bolted connections Failure to follow the specified torques reduces the ampacity of live screw connections so that the contact resistances increase. This can cause components to overheat and catch fire. Ensure that live screw connections are always executed with the exact torques specified in this document. Use suitable tools when working on the device. Avoid repeated tightening of live screw connections as this may result in inadmissibly high torques. Maintenance Manual SCCP-US-WH-US_en-30 13

14 2 Safety SMA America, LLC Risk of burns due to hot components Some components of the inverter can become very hot during operation. Touching these components can result in burn injuries. Observe the safety warnings on the components. During operation, do not touch any components marked with such messages. After disconnecting the plant from voltage sources, wait until any hot components have cooled down sufficiently. Wear Hazard Risk Category 2 personal protective equipment for all work on the inverter. Damage to the components due to dust intrusion or moisture penetration Dust intrusion or moisture penetration can damage the inverter or impair its functionality. Do not open the inverter during rainfall or humidity of more than 95%. Only maintain the inverter when the environment is dry and free of dust. Do not operate the inverter while the door is open. If present, connect the external supply voltage after having set up and installed the inverter. Switch on the circuit breaker of the external supply voltage as well as the circuit breakers of the 24 V circuits. This will activate the heating and interior fans, which will then switch on automatically. Mount all panels of the inverter when interrupting the installation process or commissioning. Close and lock the inverter. Damage to electronic components due to electrostatic discharge Electrostatic discharge can damage or destroy electronic components. Observe the ESD safety regulations when working on the device. Wear Hazard Risk Category 2 personal protective equipment for all work on the devices. Discharge electrostatic charge by touching uncoated, grounded enclosure parts, e.g. at the PE connection on the doors. Only then is it safe to touch any electronic components. 14 SCCP-US-WH-US_en-30 Maintenance Manual

15 SMA America, LLC 2 Safety 2.3 Personal Protective Equipment Always wear the personal protective equipment recommended by SMA America, LLC when working on the inverter. All clothing should be in accordance with NFPA 70E Section Appropriate Insulated gloves for shock protection in accordance with NFPA 70E Section 130.7(C), rated at least 1000V shall be worn as required. Any other prescribed protective equipment must also be used. When carrying out work on live parts of the inverter, protective equipment of at least Hazard Risk Category 2 is required in accordance with NEMA NFPA 70E, Table 130.7(C)(16). Hazard Risk Category 2 protective equipment required In accordance to NFPA 70E, an arc flash hazard risk analysis has been performed by SMA, and appropriate Arc Flash Hazard labels stating the required Personal Protective Equipment (PPE) for exposed, energized interaction with the equipment, are installed. Hazard Risk Category 2 PPE is the requirement for all routine maintenance, diagnostics, and commissioning activities as described in the SMA protocols. Areas within the machine also exist that cannot, under any circumstances, be exposed while energized. For additional information, please contact the SMA Service Line. 2.4 Symbols on the inverter Symbol Explanation DC current Earth Ground AC current On position of the AC Disconnect Off position of the AC Disconnect Maintenance Manual SCCP-US-WH-US_en-30 15

16 3 Product Description SMA America, LLC 3 Product Description This section will give you an overview of the inverter and its components. 3.1 Plant Overview The inverter converts the direct current generated in the PV modules into grid-compliant alternating current. An external transformer fitted downstream feeds the alternating current generated into the utility grid. The inverter is equipped with a touch display. An AC and DC Disconnect must be installed in accordance with NEC ANSI/NFPA 70 and CEC. The inverter can be optionally ordered with an integrated AC Disconnect and an Integrated DC Switch. With the AC Disconnect, the inverter can be disconnected from the utility grid simply and safely. This option does not require an additional AC Disconnect Unit on the AC side. With the Integrated DC Switch, the inverter can be disconnected from the PV array. If the inverter does not have an Integrated DC Switch, a Disconnect Unit must be installed between the inverter and the PV array. This allows you to easily and safely disconnect the inverter as needed. Complete inverter isolation is required for DC fuse replacement and other tasks. The DC disconnect switches in each string-combiner box must be opened to achieve complete inverter isolation. Inverter with Integrated AC Disconnect and Integrated DC Switch Figure 1: Principle of a grid-tie PV plant with an inverter with integrated AC Disconnect and Integrated DC switch Position A B C D E F Designation PV modules String-Combiner (with DC disconnect) Inverter with integrated AC Disconnect and integrated DC switch DC Disconnect Unit External transformer Utility grid Inverter with Integrated AC Disconnect and External DC Disconnect Figure 2: Principle of a grid-tie PV plant with an inverter with integrated AC Disconnect 16 SCCP-US-WH-US_en-30 Maintenance Manual

17 SMA America, LLC 3 Product Description Position A B C D E F Designation PV modules String-Combiner Inverter with integrated AC Disconnect DC Disconnect Unit External transformer Utility grid Inverter with External AC Disconnect and External DC Disconnect As an option, the internal AC circuit breaker of the inverter can be mounted externally. Circuit breaker The unit is provided with a UL listed circuit breaker on the output rated 1,600 A for branch circuit protection. If the circuit breaker shall be located externally to secure the AC path, you have to use the same type of circuit breaker (ABB Emax E2B-A with 42 ka rated short-circuit current, ABB Emax E2N-A with 65 ka rated short-circuit current or ABB Emax E2H-A with 85 ka rated short-circuit current and and 1,600 A continuous current rating each). Figure 3: Principle of a grid-tie PV plant with an inverter without integrated AC Disconnect Position A B C D E F Designation PV modules String-Combiner Inverter without integrated AC Disconnect and without integrated DC switch AC / DC Disconnect Unit External transformer Utility grid Maintenance Manual SCCP-US-WH-US_en-30 17

18 3 Product Description SMA America, LLC 3.2 Design of the Inverter Figure 4: Design of the Sunny Central Position A B C D E F G Designation Inverter cabinet Interface cabinet Touch display Key switch Service interface Integrated AC Disconnect* Integrated DC Switch* *Optional 3.3 Type Label The type label clearly identifies the product. Type labels are attached at the top right on the inside of the interface cabinet and on the top left-hand side of the inverter cabinet. You will require the information on the type label to use the product safely and when seeking customer support from the SMA Service Line. The information listed on the type label includes the following information: Device type Serial number (Serial No.) Production version (Fabrication version) Production date (Fabrication date) Device-specific data Reading the serial number You can read the serial number without opening the inverter. The serial number can be found on the roof of the inverter at the top left. You can also read the serial number from the display. Reading the firmware version You can read the version number of the firmware from the inverter and the display via the user interface or on the display. 18 SCCP-US-WH-US_en-30 Maintenance Manual

19 SMA America, LLC 3 Product Description 3.4 Symbols on the Product Symbol Designation Explanation Danger to life due to high voltages The product operates at high voltages. All work on the product must be carried out by qualified persons only. Risk of burns due to hot surfaces The product can get hot during operation. Avoid contact during operation. Allow the product to cool down sufficiently before carrying out any work. Wear personal protective equipment such as safety gloves. Observe the documentation. Observe all documentation supplied with the product. DC current Evaluated to the requirements of the Underwriters Laboratories Standard for Safety for Inverters, Converters, Controllers and Interconnection System Equipment for Use With Distributed Energy Resources, UL The inverter has been additionally evaluated by Underwriters Laboratories to CAN/CSA C22.2 No , General Use Power Supplies. Earth Ground AC current On position of the AC Disconnect Off position of the AC Disconnect 3.5 Schematic Diagram Schematic diagrams in PDF format contain jump marks. By double clicking a jump mark, the display will change to the corresponding current path or the referenced place in the equipment list. SMA recommends using schematic diagrams in PDF format during troubleshooting. The schematic diagrams in PDF format are available on request. Contact the SMA Service Line. Maintenance Manual SCCP-US-WH-US_en-30 19

20 4 Information on Maintenance SMA America, LLC 4 Information on Maintenance 4.1 Maintenance Intervals Shorter maintenance intervals in the event of adverse ambient conditions The plant location and ambient conditions influence the maintenance intervals. If the inverter is installed in adverse ambient conditions, SMA recommends a monthly inspection in order to determine the need for maintenance. The maintenance intervals are to be shortened depending on the determined maintenance requirements. In particular, cleaning work and corrosion protection may be necessary more frequently. Adherence to the maintenance intervals ensures trouble-free operation of the inverter (see the maintenance report of the inverter). Maintenance under normal ambient conditions: Description Maintenance AC circuit breaker Functional test* Cleaning* Checking the contact elements* Interval Every 24 months Every 24 months * See the manufacturer's maintenance manual of the AC circuit breaker Preventive replacement intervals: Description 24 V Power Supply Units* Inverter Bridge Fan* Interior Fan* Integrated DC Switch motor actuated DC load-break switches* Integrated AC Disconnect GFDI / ABB High-Performance Circuit Breaker* Remote Switch Unit of the GFDI* GFDI auxiliary signal contact* Surge arrester Key switch Label on the enclosure Interval Every 10 years Every 13 years Every 13 years Every 15 years or 10,000 switching cycles, whichever is sooner** After 100 trippings due to short circuit or after 7,000 switching cycles** After 7,000 switching cycles** Every 6 years If tripped In case of severe signs of wear If illegible, defective or not available * Contact the SMA Service Line. ** The trippings and switching cycles are recorded as instantaneous values (see Section 5.1 "Reading the Replacement Interval Meter", page 21). 4.2 Spare Parts Spare parts can be identified via their reference designation and the circuit diagram. The spare-parts list includes the article number of each spare part. For information on a specific article number, contact the SMA Service Line. 20 SCCP-US-WH-US_en-30 Maintenance Manual

21 SMA America, LLC 5 Maintenance with DC, AC and Control Voltage Present 5 Maintenance with DC, AC and Control Voltage Present 5.1 Reading the Replacement Interval Meter 1. Log into the user interface. 2. Enter the password in the appropriate field on the homepage and confirm with [Login]. 3. Select Data > Device. 4. Select A list of all existing device types appears. 5. Select the device type Sunny Central. A list appears containing all existing devices of this type. 6. Select the desired device from the list. 7. Select the tab Spot values. 8. Check the following meters and compare them with the replacement intervals (see Section 4.1, page 20): Number of GFDI trippings in the instantaneous value CntGfdiTripSw. If replacement of the GFDI is necessary, the error message 7714 will appear on the display. Number of switching cycles of the Remote Switch Unit of the GFDI in the instantaneous value CntGfdiSw. Number of switching cycles of the Integrated DC Switch in the instantaneous value CntDCSw. If the corresponding instantaneous value equals or is greater than the replacement interval of the component, replace the component. Contact the SMA Service Line. 5.2 Reading Error Messages and Warnings Use the service interface on the outside of the interface cabinet to connect a PC (see inverter operating manual). Procedure: If an error occurs, read off the error on the display or the user interface and remedy the error: Select the warning symbol in the navigation line of the touch display. The touch display lists the error number, delay time, error message and the necessary corrective measure to eliminate the error. 5.3 Checking the DC Contactor in Units without the Integrated DC Switch Electric shock due to live voltage High voltages are present in the inverter and its components. Touching live components results in death or serious injury. Depending on the function, some maintenance work must be carried out with voltage present. Wear Hazard Risk Category 2 personal protective equipment. Always perform work in compliance with the regulations specified in 29 CFR, Chapter XVII, Part 1910 (OSHA), NEC, and NFPA 70E. Do not touch any live components in the inverter or the medium-voltage grid. Follow the instructions precisely. Observe safety messages. Maintenance Manual SCCP-US-WH-US_en-30 21

22 5 Maintenance with DC, AC and Control Voltage Present SMA America, LLC Figure 5: Position of the DC contactor Position A Designation DC contactor Requirements: Control voltage must be present. DC voltage must be present. Procedure: 1. Switch the inverter to Stop. By doing so, the DC contactor is audibly switched off. 2. Open the doors of the interface cabinet. 3. Check the switching state of the DC contactor. The DC contactor is switched off. The DC contactor does not switch off? Contact the SMA Service Line. 4. Close the doors of the interface cabinet. 5. Switch the key switch of the inverter to Start. 22 SCCP-US-WH-US_en-30 Maintenance Manual

23 SMA America, LLC 5 Maintenance with DC, AC and Control Voltage Present 6. Open the doors of the interface cabinet. 7. Check the switching state of the DC contactor. The DC contactor is switched on. The DC contactor does not switch on? Contact the SMA Service Line. 8. Switch the inverter to Stop. 9. Test the switching process three times. Check three times whether the DC contactor has switched. 10. Close the doors of the interface cabinet. 5.4 Checking the AC Circuit Breaker Electric shock due to live voltage High voltages are present in the inverter and its components. Some maintenance work must be carried out with voltage present. Failure to adhere to the safety precautions will lead to death or serious injuries as a result of electric shock. Wear Hazard Risk Category 2 personal protective equipment. Always perform work in compliance with the regulations specified in 29 CFR, Chapter XVII, Part 1910 (OSHA), NEC, and NFPA 70E. Do not touch any live components in the inverter or the medium-voltage grid. Follow the instructions precisely. Observe safety messages. Figure 6: Switch and position displays of the AC circuit breaker Position A B C D Designation OFF button ON button Position indicator Spring status indicator Maintenance Manual SCCP-US-WH-US_en-30 23

24 5 Maintenance with DC, AC and Control Voltage Present SMA America, LLC Additionally required maintenance material (not included in the scope of delivery): A testing device approved by the manufacturer of the AC circuit breaker (e.g. TT1 from ABB). Procedure: 1. Open the doors of the interface cabinet. 2. Use the testing device to check whether the AC circuit breaker is ready for operation (instructions for testing are included in the documentation of the testing device). If a fault occurs during the test, contact the SMA Service Line. 3. Close the doors of the interface cabinet. 24 SCCP-US-WH-US_en-30 Maintenance Manual

25 SMA America, LLC 6 Disconnecting the Inverter 6 Disconnecting the Inverter Prior to performing any work on the inverter, disconnect it from any voltage sources as described in this section. Danger to life from electric shock due to live voltage High voltages are present in the live components of the inverter. Touching live components results in death or serious injury due to electric shock. When working in a high contact-risk environment, wear personal protective equipment. Always perform work in compliance with the regulations specified in 29 CFR, Chapter XVII, Part 1910 (OSHA), NEC, and NFPA 70E. Do not touch live components. Follow the instructions precisely. Observe all safety messages on the product and in the documentation. Observe all safety precautions of the module manufacturer. Before any work on the inverter is performed, always disconnect the following components from voltage sources if live voltage is not absolutely necessary: Line voltage for grid feed-in Internal power supply DC voltage from the PV array Additional external voltages, e.g. control signals of a control room Ensure that no disconnected components can be reconnected. After disconnecting the inverter from voltage sources, wait at least 15 minutes for the capacitors of the Sunny Central to discharge completely. Always check that no voltage is present in any of the components before working on the inverter. Ground and short-circuit the device. Cover or shield any adjacent live components. Danger to life from electric shock due to live DC cables DC cables connected to PV modules that are exposed to sunlight are live. Touching live components results in death or serious injury. Wear Hazard Risk Category 2 personal protective equipment for all work on the inverter. Prior to connecting the DC cables, ensure that the DC cables are voltage-free. Danger to life from electric shock due to ground fault If a ground fault has occurred, parts of the plant that are supposedly grounded may in fact be live. Touching incorrectly grounded components can result in death or very serious injuries from electric shock. Ensure that no voltage is present before touching any components of the PV plant. Wear Hazard Risk Category 2 personal protective equipment for all work on the inverter. Danger to life from electric shock when entering the PV field Ground-fault monitoring with GFDI and Advanced Remote GFDI does not provide protection from injury when GFDI is activated. PV modules grounded by GFDI discharge voltage to ground. Entering the PV field can lead to lethal electric shocks. Before entering the PV field, switch the PV array to insulated operation. Ensure that the insulation resistance of the PV array is greater than 1 k Ω. Maintenance Manual SCCP-US-WH-US_en-30 25

26 6 Disconnecting the Inverter SMA America, LLC Danger to life from electric shock if the inverter is damaged Operating a damaged inverter can lead to hazardous situations that result in death or serious injuries due to electric shock. Only use the inverter when it is technically faultless and in an operationally safe state. Regularly check the inverter for visible damage. Make sure that all external safety equipment is freely accessible at all times. Make sure that all safety equipment is in good working order. Wear Hazard Risk Category 2 personal protective equipment for all work on the inverter. Danger to life from electric shock even if the inverter is disconnected on the AC and DC sides The precharge unit of the option "Q at Night" is also live if the AC contactor and the DC switch are open. Touching live components of this assembly will result in death or serious injury. Do not touch live components. Do not remove protective covers. Observe the warning messages. Wear personal protective equipment Hazard Risk Category 2 protective equipment required In accordance to NFPA 70E, an arc flash hazard risk analysis has been performed by SMA, and appropriate Arc Flash Hazard labels stating the required Personal Protective Equipment (PPE) for exposed, energized interaction with the equipment, are installed. Hazard Risk Category 2 PPE is the requirement for all routine maintenance, diagnostics, and commissioning activities as described in the SMA protocols. Areas within the machine also exist that cannot, under any circumstances, be exposed while energized. These areas are marked accordingly on the machine, and can only be made accessible after de-energization of the inverter. For additional information, please contact the SMA Service Line. Disconnecting the AC voltage of the MV transformer Only a duly authorized person trained in electrical safety is allowed to connect and disconnect the AC voltage of the MV transformer. Procedure: 1. Switch the key switch of the inverter to Stop.. 2. If an Integrated DC Switch is present, switch the DC Switch in the door to OFF. The red light repeater lights up. 26 SCCP-US-WH-US_en-30 Maintenance Manual

27 SMA America, LLC 6 Disconnecting the Inverter 3. Secure the DC Switch in the door against accidental reconnection using a padlock. 4. Wait 15 minutes until the inverter capacitors have discharged completely. 5. Externally disconnect the AC voltage of the MV transformer. 6. If no AC Disconnect is present, disconnect the external AC/DC Disconnect Unit. 7. Disconnect the DC voltage in the main distribution or sub-distribution. 8. If an internal AC Disconnect is present, open the flap of the AC Disconnect and switch the AC Disconnect off. 9. Disconnect the external supply voltage externally. 10. If applicable, disconnect any additional external voltage. 11. Open the door of the interface cabinet. 12. Switch off the supply voltage. If the voltage is supplied externally, switch off the circuit breaker of the external voltage supply in the inverter. or If the voltage is supplied internally, switch off the circuit breaker of the internal voltage supply in the inverter. 13. Switch off the circuit breaker of the grid monitoring. Maintenance Manual SCCP-US-WH-US_en-30 27

28 7 Maintenance in Disconnected State SMA America, LLC 14. Disconnect the circuit breaker of the 24 V circuits. 15. Open the test and disconnect terminals. 16. Ensure that all poles are free of voltage. 17. Ground and short-circuit the inverter. 18. Cover or shield any adjacent live components. 19. Unscrew the protective cover over the fuses. 20. Remove all DC fuses from all DC fuse holders. Use a suitable tool or safety gloves. 7 Maintenance in Disconnected State 7.1 Safety Danger to life due to electric shock High voltages that can result in lethal electrical shocks are present in the live components of the inverter. All work must be carried out in accordance with this document. Do not touch any live components in the inverter or on the medium-voltage grid. Comply with all applicable safety regulations for handling medium-voltage grids. After disconnection, wait at least 15 minutes until the capacitors have discharged. Follow all safety precautions (see Section 2.2). Disconnect the inverter (see Section 6). 28 SCCP-US-WH-US_en-30 Maintenance Manual

29 SMA America, LLC 7 Maintenance in Disconnected State 7.2 Removing the Panels Grounding straps at the kick plates The panels are connected to the inverter via grounding straps. Procedure: 1. Danger to life due to electric shock or electric arc by touching live components Disconnect the inverter and wait 15 minutes until the capacitors have discharged completely (see Section 6). 2. Remove the screws of the front panels using a Torx screwdriver. 3. Pull the panels toward the front. 4. Disconnect the grounding cable between the panels and the interface cabinet. 5. Remove the panels. 7.3 Cleaning the Ventilation Plate Damage to the inverter due to impaired air circulation Impaired air circulation can increase the internal temperature, reduce the electrical endurance of the components and result in operational faults. Clean the ventilation plate more frequently in cases where there is high sand or dust content in the air (see maintenance report). Maintenance Manual SCCP-US-WH-US_en-30 29